According to the passage, the original proponents of the FourteenthAmendment were primarily concerned with ______.
A、detailing the fights afforded by the principle of equal citizenship
B．providing support in theConstitution for equal protection for all citizens of the United States
C、overturning theCivil RightsAct of 1866
D．asserting that the civil rights protected by theConstitution included nonracial discrimination as well as racial discrimination